JPH05167318A - Orthogonal tm multiple mode dielectric - Google Patents

Abstract

PURPOSE:To suppress the reduction of Qo caused by the bend of an electric line of force at a cross part of the columnar dielectrics for an orthogonal TM multiplex mode dielectric resonator device. CONSTITUTION:The pierced holes 2a and 2b are formed at an area which encloses a cross part of the columnar dielectrics 1a and 1b. The bend of the electric line of force passing the dielectric 1a is suppressed toward the dielectric 1b owing to the presence of the hole 2b. Meanwhile the bend of the electric line of force passing the dielectric 1b is suppressed toward the dielectric 1a owing to the presence of the hole 2b respectively.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to orthogonal TM multimode dielectric resonator devices.

[0002]

2. Description of the Related Art An example of an orthogonal TM multimode dielectric resonator device which is the background of the present invention is disclosed in Japanese Patent Laid-Open No. 61-121502.
And Japanese Patent Laid-Open No. 61-157101. This resonator device is provided with a dielectric core in which a plurality of columnar dielectrics orthogonal to each other are integrated in a cavity. With this structure, each columnar dielectric body constitutes a resonator, and the entire resonator device can be used as a plurality of resonators. Therefore, the dielectric resonator device can be downsized as compared with the case where a plurality of single-mode dielectric resonators are used.

[0003]

However, since the plurality of columnar dielectrics are orthogonal to each other, the following problems occur.

FIG. 6 shows a single mode T for comparison.
In the M-mode dielectric resonator, electric lines of force passing through the dielectric core are shown. FIG. 7 is a diagram showing the lines of electric force passing through a single columnar dielectric body in the dual mode TM mode dielectric resonator. In FIG. 7, 1a is a first columnar dielectric and 1b is a second columnar dielectric orthogonal to this. As shown in FIG. 7, the line of electric force passing through the columnar dielectric 1a is curved in the direction of the other columnar dielectric 1b at the intersection with the other columnar dielectric. Therefore, the dielectric loss is larger than that in the single mode, and the overall unloaded Q (Q
o) deteriorates by 3 to 4%.

An object of the present invention is to suppress the bending of the lines of electric force at the intersection of the columnar dielectrics when the TM mode dielectric resonators are multiplexed, thereby eliminating the above-mentioned problems.
It is to provide a multimode dielectric resonator device.

[0006]

SUMMARY OF THE INVENTION The present invention provides an orthogonal TM multi-mode dielectric resonator device in which a dielectric core in which a plurality of columnar dielectrics orthogonal to each other are integrated is provided in each cavity. It is characterized in that a region having a lower dielectric constant than the dielectric core itself is formed in a region surrounding the intersection of the bodies.

[0007]

In the orthogonal TM multi-mode dielectric resonator device of the present invention, the dielectric core provided in the cavity has a region surrounding an intersection of a plurality of columnar dielectrics orthogonal to each other.
A region having a lower dielectric constant than the dielectric core itself is formed.
Therefore, the line of electric force passing through one columnar dielectric is prevented from curving to the other columnar dielectrics, and each columnar dielectric acts substantially like a single-mode columnar dielectric, and Qo
Of the dielectric resonator is formed without deterioration.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of an orthogonal TM dual mode dielectric resonator device according to a first embodiment of the present invention is shown in FIGS.

FIG. 1 is a partially cutaway exploded perspective view of a dielectric resonator device. In FIG. 1, 1 is a dielectric core in which two columnar dielectrics 1a and 1b orthogonal to each other are integrated, 3 is a rectangular tubular frame in which the dielectric core 1 is integrated, and 4 and 5 are frame 3 Is a lid that covers the two openings of the. An electrode film is formed on the periphery of the frame 3 and the inner or outer surfaces of the two lids 4 and 5. Thus, the frame 3 and the lids 4 and 5 form a cavity that functions as a shield case. In the dielectric core 1, through holes 2a and 2b are formed in a region surrounding the intersection of the columnar dielectrics 1a and 1b as shown in FIG.

FIG. 2 is a central horizontal sectional view of the orthogonal TM multimode dielectric resonator device shown in FIG. (In order to clarify the drawing, the hatching showing the cross-sectional portion is omitted.

)). In FIG. 2, arrows indicate lines of electric force passing through one columnar dielectric body 1a. Since the through hole 2b is formed in the other columnar dielectric 1b orthogonal to the columnar dielectric 1a as shown in the figure, the lines of electric force have a low dielectric constant (filled with air) through hole 2b. It does not curve in the direction, but is distributed in a straight line. The lines of electric force pass so as to avoid the through holes 2a provided in the columnar dielectric 1a, but since the through holes 2a are flat in the direction in which the lines of electric force pass, they are hardly affected by the existence of the through holes 2a. .. The through hole 2a is a columnar dielectric 1a of an electric force line (not shown) passing through the columnar dielectric 1b.
It acts to prevent sideward bending.

Next, FIG. 3 shows a partially broken exploded perspective view of the orthogonal TM triple mode dielectric resonator according to the second embodiment.
In FIG. 3, 1 is three columnar dielectrics 1 which are orthogonal to each other.
a, 1b, 1c integrated dielectric core, 3 is a frame integrated with this dielectric core, 4 and 5 are 2 of the frame 3 respectively.
It is a lid that covers two openings. Unlike the example shown in FIG.
A total of 12 through holes 2a, 2b, 2c are formed in the region surrounding the intersection of the three columnar dielectrics. Through hole 2
a is a line of electric force passing through the columnar dielectric 1b and the columnar dielectric 1
The electric force lines passing through c are suppressed from being curved toward the columnar dielectric 1a. The through hole 2b suppresses the electric force line passing through the columnar dielectric body 1a and the electric force line passing through the columnar dielectric body 1c from being curved in the direction of the columnar dielectric body 1b. Further, the through hole 2c suppresses the electric force lines passing through the columnar dielectric body 1a and the electric force line passing through the columnar dielectric body 1b from being curved in the columnar dielectric body 1c direction.

In the first and second embodiments, a single slit-shaped through hole is formed in the widthwise direction of each columnar dielectric. However, as shown in FIG. It is also possible to form a plurality of rows of slit-shaped through holes. Further, in the embodiment described above, the slit-shaped through hole is formed in the columnar dielectric, but as shown in FIG.
A and 2b may have a round hole shape. Further, instead of the through hole, it may be a recess, and a substance having a low dielectric constant may be embedded in the columnar dielectric body.

[0014]

According to the present invention, at the intersection of a plurality of columnar dielectrics, the electric force line passing through one columnar dielectric is prevented from curving to the other columnar dielectrics. The columnar dielectric body acts almost in the same manner as the single mode columnar dielectric body to form a multiplexed dielectric resonator without deterioration of Qo.

[Brief description of drawings]

FIG. 1 is a partially broken exploded perspective view of an orthogonal TM dual mode dielectric resonator device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing lines of electric force passing through one columnar dielectric in the orthogonal TM double mode dielectric resonator device according to the first example.

FIG. 3 is a partially cutaway exploded perspective view of an orthogonal TM triple mode dielectric resonator device according to a second embodiment.

FIG. 4 is a diagram showing lines of electric force passing through one columnar dielectric in the orthogonal TM multimode dielectric resonator according to the third example.

FIG. 5 is a diagram showing lines of electric force passing through one columnar dielectric in the orthogonal TM multi-mode dielectric resonator according to the fourth example.

FIG. 6 is a diagram showing a state of lines of electric force in a conventional single mode TM mode dielectric resonator device.

FIG. 7 is a diagram showing lines of electric force passing through one columnar dielectric of a conventional orthogonal TM dual mode dielectric resonator device.

[Explanation of symbols]

 1-dielectric core 1a, 1b, 1c-columnar dielectric 2a, 2b, 2c-through hole 3-frame body 4,5-lid

Claims (1)

[Claims] 1. An orthogonal TM in which a dielectric core in which a plurality of columnar dielectrics orthogonal to each other are integrated is provided in a cavity.
In the multimode dielectric resonator device, a region having a lower dielectric constant than the dielectric core itself is formed in a region surrounding each intersection of the columnar dielectrics.
Multimode dielectric resonator device.